JP2001116180A - Construction method for installing supply pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for installing a supply pipe such that a joint can be installed at a takeout part while working hours and man hours, including the time during which the supply of gas is shut off, are reduced by eliminating the need for boring work for exposing a line. SOLUTION: The construction method comprises inserting a new line 1A into an existing line 1 to renew the existing line, and installing the takeout part of the supply pipe 10 in a portion of the renewed area thereof. A working robot 2 provided with double telescopic stoppers 3 opposite to each other across the takeout position, and a boring machine 5A and a fusion machine 9 mounted on a frame 4 provided between the stoppers 3, is inserted from the end of the renewed line 1A, with the stoppers 3 expanded and brought into intimate contact with the inner surface of the takeout position to position the robot 2. Then the boring machine 5A bores a hole from the inner surface of the line 1A renewed at the takeout position, and a takeout joint 7 conveyed by the working robot 2 is projected outwardly from the inner surface of the boring position in the renewed line 1A. The saddle surface of the takeout joint 7 is fused by the fusion machine 9 to the inner surface of the renewed line 1A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a supply pipe, and more particularly, to a method of installing a branch by an update method of laying a new pipe in an existing pipeline.

[0002]

2. Description of the Related Art One of the methods for rehabilitating and repairing existing pipelines buried underground is a renewal method of laying new pipes in existing pipelines. As a new pipe used for the renewal method, a polyethylene resin pipe having durability against an external force in the event of an earthquake or the like is used. In the renewal method, a shaft is formed at both ends of an existing section of an existing pipe such as a cast iron pipe, the existing pipe is cut, and then a polyethylene pipe is drawn in from one opening end. By the way, when a take-out part of the supply pipe is provided in a part of the updated section, conventionally,
After excavating the position corresponding to the take-out part to expose the conduit, the take-out part of the polyethylene pipe is pierced, the take-out joint is attached from the outer surface of the tube, and the saddle surface is fused to the outer surface of the tube. ing.

[0003]

However, in the supply pipe take-out structure according to the above-mentioned conventional renewal method, it is necessary to cut open the pipe at the take-out position of the supply pipe in order to expose the pipeline to the outside. In addition, there is a possibility that the cost may increase due to an increase in the working time and the number of man-hours in the supply pipe taking-out work. In addition, as for the working time, since it is necessary to cut off the gas supply in the renewal section, it is necessary to quickly and quickly reduce the time during which the gas cannot be supplied to the customer on the downstream side in the gas flow direction. Time is required.

[0004] In view of the above-mentioned problems in the conventional supply pipe installation method, an object of the present invention is to reduce the work time and work man-hour including the gas supply cut-off time by eliminating the need for excavation work for exposing the pipeline. An object of the present invention is to provide a method of installing a supply pipe, which can enable installation of a joint at a take-out part.

[0005]

In order to achieve this object, according to the first aspect of the present invention, a new pipeline is inserted into an existing pipeline, the pipeline is updated, and one of the updated sections is updated. A method of installing a take-out portion of a supply pipe in a portion, which is mounted on a double-type expandable / contractible stopper opposed to the take-out position and a gantry provided between the stoppers A machine robot equipped with a punch and a fusing machine is inserted from the end of the updated pipeline, the stopper is inflated and positioned by closely contacting the inner surface of the take-out position, and is positioned at the take-out position by the punch. Drilling is performed from the inner surface of the updated pipeline, and the take-out joint conveyed by the machine robot is projected outward from the inner surface of the updated drilling position of the pipeline, and the saddle surface of the take-out joint is updated by the welding machine. It is characterized by fusing the been conduit inner surface.

The invention according to claim 2 is characterized in that a dielectric is disposed inside the saddle surface of the take-out joint, and is fused to the updated inner surface of the pipeline by dielectric heat generated by the fusion machine. I have.

The invention according to claim 3 is characterized in that the take-out joint is mounted on the gantry and transported after the piercing operation by the piercing machine or when the work robot is inserted.

According to a fourth aspect of the present invention, the drilling machine and the take-out joint are movable toward the outside of the renewed pipeline by an elevating mechanism that can expand and contract on the inner surface of the renewed pipeline. It is characterized by having.

[0009]

According to the first and second aspects of the present invention, the drilling machine provided on the pedestal provided on the double-type inflatable stopper which is opposed to the renewed pipeline taking-out position is connected to the pipeline. Since the drilling operation is performed from the inner surface of the pipe, and then the take-out joint is fused from the inner surface of the pipeline to the take-out position, there is no need to perform open-cutting work to expose the take-out position to the outside. Moreover, since the saddle surface of the take-out joint is fused to the inner surface of the pipeline, the work from drilling to fusion of the take-out joint can be performed on the inner surface of the pipeline. Can be done in a state.

According to the third aspect of the present invention, by performing the drilling operation in a state where the take-out joint is mounted on the gantry, the take-out joint can be positioned following the drilling operation, thereby shortening the operation time. Can be achieved.

According to the fourth aspect of the present invention, since the drilling machine and the take-out joint can be positioned at required positions by the elevating mechanism, it does not hinder the movement in the pipe including the adjustment of the contraction amount of the expandable and contractible stopper. This enables smooth movement and shortens the time required for setting the working posture.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a schematic diagram for explaining a configuration used for a supply pipe installation method according to the present embodiment.
The expanded state of the stopper described later is shown. In the installation method according to the present embodiment, a work robot 2 that is movable in a new pipeline (hereinafter referred to as an updated pipeline) 1A such as a polyethylene pipe laid in the existing pipeline 1 and updated is used. The machine robot 2 includes a double-stopper 3 arranged in the direction of laying the high-news publication 1A, and a gantry 4 provided between the stoppers 3. Each of the double stoppers 2 is formed of a balloon-shaped member using an inflatable material such as rubber, and is arranged with an interval larger than the inner diameter of a take-out hole formed in the take-out portion. Stand 4
, The stopper 3 is integrally supported in the vicinity of both ends in the laying direction of the renewal pipeline 1 </ b> A, and the end is located outside the stopper 3. The inside of the gantry 4 is hollow, and the end is located outside each stopper 3,
In FIG. 1, the upstream side and the downstream side of the gas flow direction indicated by arrow F are communicated with each other. The gantry 4 is connected to one end of a rod member 6 that can be pulled and pressed at one end in the laying direction of the update pipeline 1A.
Can be moved in the renewal pipeline 1A by pulling or pressing.

On the gantry 4, a drive mechanism 5 that can move up and down and rotate is arranged between the stoppers 3. The driving mechanism 5
It has a bamboo-shaped telescopic rod, and a detachable drilling cutter 5A is provided at the tip of the telescopic rod. When the piercing cutter 5A is detached from the distal end of the telescopic rod, a mounting table 8 (see FIG. 4) capable of mounting and holding a take-out joint 7 made of polyethylene, which will be described later, can be attached.

In this embodiment, a take-out unit is provided by the following procedure using the machine robot 2 having the above-described configuration. (1) The machine robot 2 is inserted and moved toward the position of the take-out portion of the update pipeline 1A laid in the existing pipeline 1. In this case, the stopper 3 is contracted. For this reason, the gantry 4 is also compared with the renewal pipeline 1A compared to when the stopper 3 is expanded.
And the hole cutter 5A moves without contacting the inner surface of the pipeline. When the machine robot 2 reaches the take-out position in the update pipeline 1A, the stopper 3 is expanded. For this reason, the stopper 3 is pressed against the inner surface of the update pipeline 1A and is positioned at the take-out position.

(2) When the take-out position is determined, a take-out hole is formed. In this case, update line 1
At the time of insertion into A, a drilling cutter 5A that is previously provided at the distal end of the telescopic rod of the drive mechanism 5 is used. The piercing cutter 5A extends while rotating by the drive mechanism 5, and pierces the renewal pipeline 1A and the existing pipeline 1 as shown in FIG. The extension stroke in this case is set based on information from a position sensor such as a stroke sensor in a control unit (not shown) attached to the drive mechanism 5.

(3) After the piercing is completed, the take-out joint 7 is carried in. In this case, the telescopic rod of the drive mechanism 5 is contracted, the drilling cutter 5A is in the same position as when it is inserted, and the machine robot 2 is once removed from the removal position. The machine robot 2 taken out of the update pipeline 1A has
As shown in the figure, the mounting table 8 is attached to the distal end of the telescopic rod in the contracted state.
Is placed and held, and the induction coil 9 is arranged near the saddle surface of the take-out joint 7. The induction coil 9 is supplied with power from a power supply unit (not shown) provided in the drive mechanism 5. A coil is built in the saddle surface of the take-out joint 7, similarly to this kind of polyethylene joint, so that dielectric heating by induced electromotive force from the induction coil 9 can be performed. In the present embodiment, the mounting table 8 is also provided with a coil facing the saddle surface, and a current from the induction coil 9 also flows through this coil to generate an induced electromotive force in the coil in the saddle surface, and the entire surface of the saddle surface It is possible to generate heat. In a state where the machine robot 2 has the take-out joint 7 mounted thereon, it moves to the take-out position of the update pipeline 1A again and is positioned. Also in this case, when the machine robot 2 moves, the stopper 3 is in a contracted state, and the movement is smoothly performed.

(4) The taken-out joint 7 is integrated with the renewal pipeline 1A. In this case, as shown in FIGS. 3 and 4, the telescopic rod of the drive mechanism 5 is extended, and the saddle surface of the take-out joint 7 on the mounting table 8 can contact the inner surface of the renewal pipeline 1A. When the saddle surface of the take-out joint 7 is brought into contact with the inner surface of the renewal pipe 1A, in addition to the amount of extension of the telescopic rod, the amount of rise of the gantry 4 due to the expansion of the stopper 3 that was in a contracted state at the time of reinsertion is determined. By appropriately setting the saddle surface of the take-out joint 7, the renewal pipe 1
A can be brought into contact with the inner surface. When the dielectric coil 9 is energized while being in contact with the inner surface of the saddle surface perforated new publication road 1A,
The saddle surface is heated by dielectric heat and fused to the inner surface of the renewal pipeline 1A.

(5) After the fusion of the saddle surface due to the dielectric heat generation, the telescopic rod is contracted to lower the mounting table 8, and the work robot 2 is taken out from the update pipeline 1A.

According to the above-described embodiment, the formation of the take-out portion and the fusion work of the take-out joint can be performed on the inner surface of the renewal pipe 1A. Can be provided. In addition, since the inside of the gantry 4 is hollowed out, if an airtight space is formed by the stopper 3 in order to prevent gas leakage at the take-out portion, it is assumed that the gas supply is interrupted by the airtight space. It can be prevented by flowing gas to the user, thereby reducing inconvenience to the consumer.

By the way, a supply pipe is connected to the take-out joint 7 at the take-out part, and the supply pipe is laid at a gas demand destination. Therefore, in this embodiment, the operation of connecting the supply pipe to the take-out joint 7 is also performed without cutting the take-out position. Hereinafter, this method will be described with reference to FIG. FIG. 5 shows a state in which the supply pipe 10 is connected to the take-out joint 7. In FIG. 5, the supply pipe 10 introduced from the ground side is positioned at the end of the take-out joint 7 by a procedure described later. I have. On the inner surface of the connection end of the take-out joint 7 and the supply pipe 10, a joining member 11 that straddles and opposes the connection end is arranged. The joining member 11
It is pressed by the induction coil 12 supported on a support member 12A which is disposed inside and opposes the installation coil 9 and has a distance from the arrangement position of the induction coil 9 to the connection end, and is brought into contact with the inner surface of the connection end. The joining member 11 has a coil mounted therein, and is fused to the inner surfaces of the connection ends of the take-out joint 7 and the supply pipe 10 by dielectric heat generated via an induction coil 12 described later. I have. The induction coil 12 is supplied with power independently to the induction coil 9, and is supplied with electricity after the supply pipe 10 is positioned.

In FIG. 5, the take-out joint 7 and the supply pipe 1 are shown.
0, the induction coil 12 is energized and the joint member 11 is connected to the joint member 1 and the supply pipe 10 by the dielectric heat.
Fused to 1.

Next, the step of inserting the supply pipe 10 will be described. When the supply pipe 10 is a meter vertical pipe at a demand destination, a boring pit 20 is formed at a location where the supply pipe 10 corresponding to the meter vertical pipe is extended above the ground, and the boring pit 2 is formed.
The supply pipe 10 is inserted into the chamber 0. Thereby, the supply pipe 10
And the end of the take-out joint 7 are joined, and in this state, the inner surfaces of the connection ends of the take-out joint 7 and the supply pipe 10 are integrated via the joining member 11 by supplying power to the induction coil 12 according to the above-described procedure. Is done. Thus, the supply pipe 1
Since the drilling is required only by excavating the borehole from the ground-side take-out position of 0 and no back-filling is required, the number of working steps can be reduced even when the supply pipe 10 is connected to the take-out joint. Moreover, since the connection joint 11 and the inner surface of the connection end of the supply pipe 10 can be fused via the joint member 11, the joining position is determined only by fitting the end of the supply pipe 10 to the joint member 11. This makes it possible to eliminate the necessity of excavation for exposing the joint position.

[0023]

According to the first and second aspects of the present invention,
A drilling machine provided on the side of the double expandable / contractible stopper opposite to the renewed pipe take-out position performs a drilling operation from the inside of the pipe, and then takes out the joint from the inside of the pipe. Since fusion is performed at the take-out position, it is possible to eliminate the need for digging work for exposing the take-out position to the outside. Moreover, since the saddle surface of the take-out joint is fused to the inner surface of the pipeline, the work from drilling to fusion of the take-out joint can be performed on the inner surface of the pipeline. Can be done in a state. This makes it possible to reduce work time and man-hours by eliminating the need for work steps such as backfill work.

According to the third aspect of the present invention, by performing the drilling operation with the take-out joint mounted on the gantry, it is possible to position the take-out joint following the drilling operation, thereby reducing the working time. Can be shortened.

According to the fourth aspect of the present invention, since the drilling machine and the take-out joint can be positioned at necessary places by the lifting / lowering mechanism, the drilling machine and the take-out joint are not obstructed when moving in the pipe including the adjustment of the contraction amount of the expandable / contractible stopper. This makes it possible to move smoothly and reduce the time required for setting the working posture.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining a method of installing a supply pipe according to an embodiment of the present invention.

FIG. 2 is a configuration diagram for explaining one embodiment of the installation method shown in FIG.

FIG. 3 is a configuration diagram for explaining a transfer process of a take-out joint in the installation method shown in FIG. 1;

FIG. 4 is a configuration diagram for explaining a step of fusing a detachable joint by the installation method shown in FIG. 1;

FIG. 5 is a configuration diagram for explaining a case where a supply pipe is connected to a take-out joint after the fusion step shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing pipeline 1A Updated pipeline 2 Machine robot 3 Stopper 4 Mount 5 Drive mechanism 5A Drilling cutter 7 Extraction joint 9, 12 Induction coil 10 Supply pipe 11 Joining member

Claims (4)

[Claims] 1. A method for inserting a new pipeline into an existing pipeline, updating the pipeline, and installing a take-out portion of a supply pipe in a part of the updated section. A machine robot comprising a double-type inflatable stopper opposing at a position and a drilling machine and a fusing machine mounted on a gantry provided between the stoppers is connected to the updated pipeline. The stopper is inflated and positioned by bringing it into close contact with the inner surface of the take-out position, and is pierced from the inner surface of the pipeline updated to the take-out position by the drilling machine, and is taken out by the work robot. Characterized by projecting outwardly from the inner surface of the updated pipeline at the drilling position, and fusing the saddle surface of the take-out joint to the inner surface of the updated pipeline by the fusion machine. 2. The renewed pipe inner surface according to claim 1, wherein a dielectric is disposed inside the saddle surface of the take-out joint, and is fused to the renewed pipe inner surface by dielectric heat generated by the fusing machine. Installation method of supply pipe. 3. The take-out joint is mounted and transported on the gantry after the drilling operation by the drilling machine or when the work robot is inserted.
Supply pipe installation method described. 4. The drilling machine and the take-out joint are movable outwardly of the renewed pipeline by an elevating mechanism that can expand and contract on the inner surface of the renewed pipeline. The method for installing a supply pipe according to claim 1.